/*
 * Copyright 2025 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package androidx.privacysandbox.sdkruntime.core.controller

import androidx.annotation.Keep
import androidx.annotation.RestrictTo
import androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP
import org.jetbrains.annotations.TestOnly

/** Holds client provided implementation of [SdkSandboxControllerBackend]. */
@RestrictTo(LIBRARY_GROUP)
public object SdkSandboxControllerBackendHolder {
    public var LOCAL_BACKEND: SdkSandboxControllerBackend? = null

    /**
     * Inject backend from client library. Implementation will be used only if loaded locally. This
     * method will be called from client side via reflection during loading SDK.
     */
    @JvmStatic
    @Keep
    public fun injectLocalBackend(backend: SdkSandboxControllerBackend) {
        check(LOCAL_BACKEND == null) { "Local backend already injected" }
        LOCAL_BACKEND = backend
    }

    @TestOnly
    public fun resetLocalBackend() {
        LOCAL_BACKEND = null
    }
}
